Lamp-socket casing or the like.



C. .l. KLEIN. [AMP SOCKET CASING OR THE LIKE. APPLICATION FILED bro. 9. 1913.

1,235,531. 4 V PatehtedJfilySl, 1917..

CHARLES a. KLEIN, or MILWAUKEE, Wiscons n,

LAMP-SOCKET CASING on THE LIKE.

T0 all whom it may concern:

Be it known that I, CHARLEs'J. KLEIN, a citizen of the United States, residing at Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented hew and useful Improvements in Lamp-Socket Casings or the like, of which the following is a full, clear, concise, and exact description,

reference being had to the accompanying drawing, forming a part of this specification.

This invention relates to casings for lamp sockets or the like, and more particularly to interlocking means for the sections of such I Fig. 3 is an enlarged detail view of they interlocking means showing the parts thereof separated;

Fig. l is erspective view of the same;

and,

Fig. 5 is a central longitudinal section through the interlocking means with the v5 on one part, preferablythe cap, and 00- operating shoulders 6 on the other. In practice, two oppositely disposed sets of cooperating catches and shoulders are employed.

The structure and arrangement of the interlocking means'are clearly'shown in Figs. 3, a, and 5.. As there indicated, the catch-5 is spaced from the margin of the cap and formed bycrimping inwardly and upwardly a segmental portion of the wall 3 at one side Specification of Letters Patent.

of a transverse slit 7. The catch thus comprises an upper bearing surface '8 and converging side walls 9 integral and continuous with the cap rim. The upper bearing surface 8 is preferably inclined to meet the interior of the wall 3 at a slightly acute angle,

Patented July 31, 391?.

Application filed December 8, 1913. Serial No. 805,289.

while the free edges 10 of the side walls 9 are inherently tapered from the tip of the catch to the wall 3 at the ends of the line 7. The edge of the cap thus remains continuous and the strip of metal 11 below each catch serves'to strengthen the base of the latter and reinforce the same.

While the shoulders 6 may be formed in Various ways, in practice they preferably sponding in contour to the segmental conformation of the catches.

The cap and shell may be readily attached by first alining the two sets of interlocking means and then telescoping the parts together. During the latter. operation the catches 5' slip over the shell margin and en- ,ter the openings 12 with a snap, due to the resiliency of the shell. The bearing surfaces 8 of the catches thereupon abut the upper parts of the shoulders 6 to support the shell. At the same time, the side walls 9 of the catches abut the depending parts of 'cemprise apertures 12 in the shell correthe shoulders 6 to prevent relative rotation.

of the sections. The cap and shell are thus locked against bothaxial separation and relative rotation. Moreover, the effectiveness of the axial lock is increased by the inclination of the upper bearing surfaces of the catches, while the effectiveness of the rotary lock is enhanced ,by the opposed curved side walls of the catches and shoulders.

Furthermore, assembly of the sections of the casing is facilitated by the arrangement of the interlocking means described since the shell may be partially inserted in the ca'pand the shoulders alined before the margin of the shell abuts the catches 5. Thus any tendency of the cap and shell to slip out of registry during attachment is efi'ectually prevented by the overlapping edges of the two parts.

Separation of the sections is readily ob tained by compressing-the shell beneath the shoulders 6 until the same are released from the catches, whereupon the shell may be ders 6. These notches are designed to receifV-e thecatches 5' offithecap and thereby further 'insure positive alinementof: the in,- terl'ocking means to facilitate assembly of the-twosections of. the casing.

What I: claim as nevvv and desire-to isecure bylietters Patentis LA casin y for lampv sockets compris-v ing a, capv an E a shell adapted to 'telescopie allyfunite one of: said: members-having it struck. up catch comprising a segmental portion thereof engaging a correspondingly shaped? shoulder. on v the other member to prevent separa-tiom of" said members,. said v catchiand. sh0u1der being arched to provide a:

maximum engaging surface opposing, relae tiVe;-r.otation, ofthe members,, and saidiarched'; catch: having beveled edges; formed by the chord edge' ofi said; segmental portion 2; A. casing for lamp sockets comprising; a: cap and, at shell adapted t to telescopically unite, one of said members having; a struck. upycatch-iengaging acorrespondinglyshaped shoulderon the other; member-,1. to prevent;

separation thereof; said? cat'cliv and? shoulderbeing arched: to provide a maximum engage;- ing surface opposlng relatlve,-1rotat1onofsthe members, said] catch also being; hooked-v at van acute angle. to oppose disengagement thereof from saidl shoulder:

3.. A- casing; for lamp sockets" comprising;

cap and! a shel1 adapted; to: telescopically unite, one of'said-lmembers having aninte- Y grali catch inset, from; its edge. and hooked at an acute angle to positively engage Within a correspondingly shaped 1 shoulder on I the other member, to ,lock. said'l members against" separation, saidr' catch; and' shoulder: beingarched'r to provide a: maximum 4engagings-urfaceyfunctioning' to-prevent3relative I rotation oft-the: members:

Inzwit'ness WhereoflLI have hereunto subscribed my name in the: presence; of tWo Witnesses.

CHARLES J5 KLEIN; Witnesses: A

Fq." .WATSONV F. HUBBARD; 

